1 files changed, 67 insertions, 0 deletions
diff --git a/test/user_tests/kernel_test/error.test.cc b/test/user_tests/kernel_test/error.test.cc
new file mode 100644
index 00000000..ece8f71d
--- /dev/null
+++ b/test/user_tests/kernel_test/error.test.cc
@@ -0,0 +1,67 @@
+/// \file error.test.cc
+/// \brief Error handling API tests.
+/// \author Amlal El Mahrouss (amlal at nekernel dot org)
+
+#include <libSystem/SystemKit/System.h>
+#include <public/frameworks/KernelTest.fwrk/headers/TestCase.h>
+
+/// \note ErrGetLastError tests
+KT_DECL_TEST(ErrGetLastErrorInitial, []() -> bool {
+  SInt32 error = ErrGetLastError();
+  return error >= 0;
+});
+
+KT_DECL_TEST(ErrGetLastErrorAfterSuccess, []() -> bool {
+  auto heap = MmCreateHeap(1024, 0);
+  if (!heap) return NO;
+
+  SInt32 error = ErrGetLastError();
+  MmDestroyHeap(heap);
+
+  return error == 0;
+});
+
+KT_DECL_TEST(ErrGetLastErrorAfterFailure, []() -> bool {
+  auto heap = MmCreateHeap(0, 0);
+
+  SInt32 error = ErrGetLastError();
+
+  return error != 0;
+});
+
+KT_DECL_TEST(ErrGetLastErrorAfterInvalidFile, []() -> bool {
+  auto file = IoOpenFile("/invalid/path/that/does/not/exist", nullptr);
+
+  SInt32 error = ErrGetLastError();
+
+  if (file) IoCloseFile(file);
+
+  return error != 0;
+});
+
+KT_DECL_TEST(ErrGetLastErrorAfterNullOp, []() -> bool {
+  auto ptr = MmCopyMemory(nullptr, nullptr, 10);
+
+  SInt32 error = ErrGetLastError();
+
+  return error != 0;
+});
+
+KT_DECL_TEST(ErrGetLastErrorMultipleCalls, []() -> bool {
+  SInt32 error1 = ErrGetLastError();
+  SInt32 error2 = ErrGetLastError();
+
+  return error1 == error2;
+});
+
+/// \brief Run error tests.
+IMPORT_C SInt32 KT_TEST_MAIN() {
+  KT_RUN_TEST(ErrGetLastErrorInitial);
+  KT_RUN_TEST(ErrGetLastErrorAfterSuccess);
+  KT_RUN_TEST(ErrGetLastErrorAfterFailure);
+  KT_RUN_TEST(ErrGetLastErrorAfterInvalidFile);
+  KT_RUN_TEST(ErrGetLastErrorAfterNullOp);
+  KT_RUN_TEST(ErrGetLastErrorMultipleCalls);
+
+  return KT_TEST_SUCCESS;
+}